Fate and Transport of Shale-derived, Biogenic Methane

Abstract Natural gas extraction from unconventional shale gas reservoirs is the subject of considerable public debate, with a key concern being the impact of leaking fugitive natural gases on shallow potable groundwater resources. Baseline data regarding the distribution, fate, and transport of thes...

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Autores principales:	M. Jim Hendry, Erin E. Schmeling, S. Lee Barbour, M. Huang, Scott O. C. Mundle
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1a9e63c3d6bc451da9f916af45e5d286
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spelling	oai:doaj.org-article:1a9e63c3d6bc451da9f916af45e5d2862021-12-02T16:06:03ZFate and Transport of Shale-derived, Biogenic Methane10.1038/s41598-017-05103-82045-2322https://doaj.org/article/1a9e63c3d6bc451da9f916af45e5d2862017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05103-8https://doaj.org/toc/2045-2322Abstract Natural gas extraction from unconventional shale gas reservoirs is the subject of considerable public debate, with a key concern being the impact of leaking fugitive natural gases on shallow potable groundwater resources. Baseline data regarding the distribution, fate, and transport of these gases and their isotopes through natural formations prior to development are lacking. Here, we define the migration and fate of CH4 and δ13C-CH4 from an early-generation bacterial gas play in the Cretaceous of the Williston Basin, Canada to the water table. Our results show the CH4 is generated at depth and diffuses as a conservative species through the overlying shale. We also show that the diffusive fractionation of δ13C-CH4 (following glaciation) can complicate fugitive gas interpretations. The sensitivity of the δ13C-CH4 profile to glacial timing suggests it may be a valuable tracer for characterizing the timing of geologic changes that control transport of CH4 (and other solutes) and distinguishing between CH4 that rapidly migrates upward through a well annulus or other conduit and CH4 that diffuses upwards naturally. Results of this study were used to provide recommendations for designing baseline investigations.M. Jim HendryErin E. SchmelingS. Lee BarbourM. HuangScott O. C. MundleNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Jim Hendry Erin E. Schmeling S. Lee Barbour M. Huang Scott O. C. Mundle Fate and Transport of Shale-derived, Biogenic Methane
description	Abstract Natural gas extraction from unconventional shale gas reservoirs is the subject of considerable public debate, with a key concern being the impact of leaking fugitive natural gases on shallow potable groundwater resources. Baseline data regarding the distribution, fate, and transport of these gases and their isotopes through natural formations prior to development are lacking. Here, we define the migration and fate of CH4 and δ13C-CH4 from an early-generation bacterial gas play in the Cretaceous of the Williston Basin, Canada to the water table. Our results show the CH4 is generated at depth and diffuses as a conservative species through the overlying shale. We also show that the diffusive fractionation of δ13C-CH4 (following glaciation) can complicate fugitive gas interpretations. The sensitivity of the δ13C-CH4 profile to glacial timing suggests it may be a valuable tracer for characterizing the timing of geologic changes that control transport of CH4 (and other solutes) and distinguishing between CH4 that rapidly migrates upward through a well annulus or other conduit and CH4 that diffuses upwards naturally. Results of this study were used to provide recommendations for designing baseline investigations.
format	article
author	M. Jim Hendry Erin E. Schmeling S. Lee Barbour M. Huang Scott O. C. Mundle
author_facet	M. Jim Hendry Erin E. Schmeling S. Lee Barbour M. Huang Scott O. C. Mundle
author_sort	M. Jim Hendry
title	Fate and Transport of Shale-derived, Biogenic Methane
title_short	Fate and Transport of Shale-derived, Biogenic Methane
title_full	Fate and Transport of Shale-derived, Biogenic Methane
title_fullStr	Fate and Transport of Shale-derived, Biogenic Methane
title_full_unstemmed	Fate and Transport of Shale-derived, Biogenic Methane
title_sort	fate and transport of shale-derived, biogenic methane
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1a9e63c3d6bc451da9f916af45e5d286
work_keys_str_mv	AT mjimhendry fateandtransportofshalederivedbiogenicmethane AT erineschmeling fateandtransportofshalederivedbiogenicmethane AT sleebarbour fateandtransportofshalederivedbiogenicmethane AT mhuang fateandtransportofshalederivedbiogenicmethane AT scottocmundle fateandtransportofshalederivedbiogenicmethane
_version_	1718385132759416832

Fate and Transport of Shale-derived, Biogenic Methane

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